Environmental Specifications Temperatureiii: - Operating: -21?C to 50?C / -5.8?F to 122?F - Storage: -51?C to 71?C / -60?F to 160?F Humidity: - 95% RH , non-condensing ATEX Certifications ATEX / IECEx zone 2/22 II 3G Ex ic IIC T4 Gc II 3D Ex ic IIIB T130?C Dc